ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Nanostructured CeO2 powder was synthesized by a thermochemical process and itsapplicability as an oxygen gas sensor was investigated. An amorphous precursor was prepared byspray drying a cerium-nitrate solution and then heat-treated in air to induce evaporation of volatilecomponents from the precursor powder, which then forms nanostructured ceria. The powderproduced possessed a loose agglomerated structure with extremely fine CeO2 particles about 15 nmin size, resulting in a very high specific surface area (110 m2/g). The average grain size of aspecimen sintered from the ceria powder at 1000 oC was about 40 nm, and its oxygen sensitivity n(logσ [removed info] log(PO2/Po)-n) was about 1/4 at 600 oC. The response time t90, time for responding to achange of oxygen partial pressure, of the specimens sintered at 800 ~ 1100 oC was very short, i.e., 3~ 5 seconds: The signal output was almost identical and uniformly repeated in a stable manner
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.534-536.61.pdf
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